Magnetic Sand Control in Wellbores
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Solution Overview
Problem
Current methods for controlling sand production during hydrocarbon extraction from poorly consolidated formations lead to premature tool failure, increased pressure differentials, and additional loose sand production, as they fail to effectively manage sand particles and prevent their accumulation in the wellbore.
Innovation Solution
A method involving the magnetization of both loose and cemented sand particles within the production zone using a continuous magnetic field generated by a magnetic source, which counteracts the production fluid drag force, preventing the mobilization of sand particles and maintaining their cementation strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If production fluid velocity is increased to maintain desired production rates, then productivity improves, but production fluid drag force increases causing new loose sand particles to dislodge from cemented sand particles
Solution Approach 1:
The patent replaces the mechanical approach of reducing production fluid velocity with a magnetic field-based system. A magnetic source generates a magnetic field that applies forces to sand particles, counteracting the mechanical drag force from production fluid without requiring reduction in production rate. This substitution allows maintaining desired productivity while preventing sand production through non-mechanical means.
Solution Approach 2:
The patent changes the physical state or properties of the system by introducing a magnetic field parameter. By applying a magnetic field with specific strength and configuration, the system alters the force balance on sand particles, adding a magnetic force component that counteracts fluid drag. This parameter change enables maintaining high production rates while preventing sand dislodgement through magnetic field control rather than velocity control.
2Object-generated harmful factors
If production fluid velocity is reduced to prevent sand production, then sand production decreases, but productivity and hydrocarbon recovery are compromised
Solution Approach 1:
Instead of using mechanical velocity reduction to control sand production, the patent employs a magnetic field system that applies electromagnetic forces to sand particles. This substitution allows maintaining high fluid velocities for productivity while using magnetic forces to prevent sand particle dislodgement, thereby resolving the trade-off between productivity and sand production control.
Solution Approach 2:
The magnetic field acts as an intermediary force between the production fluid and sand particles. Rather than directly controlling fluid velocity to manage sand production, the magnetic field mediates the interaction by applying counteracting forces to sand particles, enabling independent optimization of both production rate and sand production control.
3Object-generated harmful factors
If conventional sand control methods are used, then sand production is controlled, but premature tool failure and increased pressure differentials occur
Solution Approach 1:
The patent replaces conventional mechanical sand control tools (such as screens, packs, or diverters) with a magnetic field-based system. This substitution eliminates the mechanical components that are subject to wear, erosion, and failure from sand accumulation, thereby improving tool reliability and extending operational life while maintaining sand production control through magnetic forces.
Solution Approach 2:
The magnetic field system provides self-service sand control without requiring physical intervention or maintenance of mechanical components. The magnetic source continuously generates the magnetic field that prevents sand production, eliminating the need for mechanical tools that would require replacement or repair due to sand-related damage.
4Object-generated harmful factors
If mechanical sand control tools are deployed, then sand particles are contained, but accumulation of sand in the wellbore increases pressure differentials
Solution Approach 1:
By replacing mechanical sand control tools with a magnetic field system, the patent eliminates the wellbore accumulation mechanism. Instead of containing sand particles mechanically (which leads to accumulation and pressure differentials), the magnetic field prevents sand production at the source by counteracting fluid drag forces on sand particles, thereby avoiding accumulation and associated pressure differential increases.
Solution Approach 2:
The patent converts the potentially harmful effect of production fluid drag force (which causes sand production) into a beneficial control mechanism. By applying a magnetic field that counteracts the drag force, the system uses the understanding of the harmful mechanism to create a precise counteracting force, preventing sand production without creating the secondary problem of sand accumulation and pressure differentials associated with mechanical control methods.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach prevents the production and formation of loose sand particles, stabilizes the formation, reduces equipment damage, and extends wellbore run times by maintaining a balance between the repulsive magnetic force and production fluid drag force, ensuring reliable hydrocarbon production.
Implementation Method 1
operating the magnetic source such that a continuous magnetic field is generated
Implementation Method 2
Both the magnetized loose sand particle and the magnetized cemented sand particle within the continuous magnetic field experience a continuous repulsive magnetic force
Data Source
AI summary
A method for preventing the production and formation of loose sand particles during production of a production fluid includes converting in the production zone both a loose sand particle into a magnetized loose sand particle and a cemented sand particle into a magnetized cemented sand particle. The method includes introducing a magnetic source into a wellbore. The method includes operating the magnetic source such that a continuous magnetic field is generated and the continuous repulsive magnetic force is less than the mean cementation strength. The method includes producing the production fluid from the production zone to the wellbore at a production rate. The method includes maintaining the magnetic source and the production rate of the hydrocarbon fluid such that within the distance from the magnetic source the production fluid drag force is less than or equal to the continuous repulsive magnetic force.